X server segfault with 430.14

I have an “optimus” laptop (haswell iGP and nvidia 740M GPU) running Gentoo with kernel 4.19.37 and nvidia driver 430.14 where X server works through PRIME (XrandR offloading as per http://us.download.nvidia.com/XFree86/Linux-x86_64/418.74/README/randr14.html )

Until recently everything was just fine, but after some recent update X server started to crash:

[    14.575] (II) Initializing extension NV-CONTROL
[    14.832] (II) modeset(G0): Damage tracking initialized
[    14.837] (EE)
[    14.837] (EE) Backtrace:
[    14.842] (EE) 0: /usr/bin/X (xorg_backtrace+0x40) [0x560a3b531340]
[    14.842] (EE) 1: /usr/bin/X (0x560a3b38d000+0x1a7fa9) [0x560a3b534fa9]
[    14.842] (EE) 2: /lib64/libpthread.so.0 (0x7f708546a000+0x122a0) [0x7f708547c2a0]
[    14.842] (EE) 3: /lib64/libc.so.6 (memcpy+0x1f) [0x7f708535782f]
[    14.842] (EE) 4: /usr/lib64/libnvidia-glcore.so.430.14 (0x7f7082469000+0x118a299) [0x7f70835f3299]
[    14.842] (EE) 5: /usr/lib64/libnvidia-glcore.so.430.14 (0x7f7082469000+0x118a3fd) [0x7f70835f33fd]
[    14.842] (EE) 6: /usr/lib64/libnvidia-glcore.so.430.14 (0x7f7082469000+0xe73a48) [0x7f70832dca48]
[    14.842] (EE) 7: /usr/lib64/xorg/modules/extensions/libglxserver_nvidia.so (0x7f708077f000+0x8c2d32) [0x7f7081041d32]
[    14.842] (EE)
[    14.842] (EE) Segmentation fault at address 0x7f708113b000
[    14.842] (EE)
Fatal server error:
[    14.842] (EE) Caught signal 11 (Segmentation fault). Server aborting

I suspect it started after nvidia driver update, but switching back to old driver doesn’t help.
Rebuilding xorg-server doesn’t help as well…
Full X log is https://pastebin.com/exr7gZLT
xorg.conf is https://pastebin.com/WQc37dCQ

Please see this:
https://devtalk.nvidia.com/default/topic/1050786/linux/nvidia-drivers-430-09-causes-xorg-segfault-at-start-/

It is my case indeed, thanks!